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1225 lines
43 KiB
1225 lines
43 KiB
from datetime import (
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datetime,
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timedelta,
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)
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import inspect
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import numpy as np
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import pytest
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from pandas._libs.tslibs.timezones import dateutil_gettz as gettz
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import pandas.util._test_decorators as td
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import pandas as pd
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from pandas import (
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Categorical,
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CategoricalIndex,
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DataFrame,
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Index,
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MultiIndex,
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Series,
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date_range,
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isna,
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)
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import pandas._testing as tm
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from pandas.api.types import CategoricalDtype as CDT
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import pandas.core.common as com
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class TestReindexSetIndex:
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# Tests that check both reindex and set_index
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def test_dti_set_index_reindex_datetimeindex(self):
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# GH#6631
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df = DataFrame(np.random.random(6))
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idx1 = date_range("2011/01/01", periods=6, freq="M", tz="US/Eastern")
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idx2 = date_range("2013", periods=6, freq="A", tz="Asia/Tokyo")
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df = df.set_index(idx1)
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tm.assert_index_equal(df.index, idx1)
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df = df.reindex(idx2)
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tm.assert_index_equal(df.index, idx2)
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def test_dti_set_index_reindex_freq_with_tz(self):
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# GH#11314 with tz
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index = date_range(
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datetime(2015, 10, 1), datetime(2015, 10, 1, 23), freq="H", tz="US/Eastern"
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)
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df = DataFrame(np.random.randn(24, 1), columns=["a"], index=index)
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new_index = date_range(
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datetime(2015, 10, 2), datetime(2015, 10, 2, 23), freq="H", tz="US/Eastern"
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)
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result = df.set_index(new_index)
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assert result.index.freq == index.freq
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def test_set_reset_index_intervalindex(self):
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df = DataFrame({"A": range(10)})
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ser = pd.cut(df.A, 5)
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df["B"] = ser
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df = df.set_index("B")
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df = df.reset_index()
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def test_setitem_reset_index_dtypes(self):
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# GH 22060
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df = DataFrame(columns=["a", "b", "c"]).astype(
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{"a": "datetime64[ns]", "b": np.int64, "c": np.float64}
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)
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df1 = df.set_index(["a"])
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df1["d"] = []
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result = df1.reset_index()
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expected = DataFrame(columns=["a", "b", "c", "d"], index=range(0)).astype(
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{"a": "datetime64[ns]", "b": np.int64, "c": np.float64, "d": np.float64}
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)
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tm.assert_frame_equal(result, expected)
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df2 = df.set_index(["a", "b"])
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df2["d"] = []
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result = df2.reset_index()
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tm.assert_frame_equal(result, expected)
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@pytest.mark.parametrize(
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"timezone, year, month, day, hour",
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[["America/Chicago", 2013, 11, 3, 1], ["America/Santiago", 2021, 4, 3, 23]],
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)
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def test_reindex_timestamp_with_fold(self, timezone, year, month, day, hour):
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# see gh-40817
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test_timezone = gettz(timezone)
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transition_1 = pd.Timestamp(
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year=year,
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month=month,
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day=day,
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hour=hour,
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minute=0,
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fold=0,
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tzinfo=test_timezone,
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)
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transition_2 = pd.Timestamp(
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year=year,
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month=month,
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day=day,
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hour=hour,
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minute=0,
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fold=1,
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tzinfo=test_timezone,
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)
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df = (
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DataFrame({"index": [transition_1, transition_2], "vals": ["a", "b"]})
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.set_index("index")
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.reindex(["1", "2"])
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)
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tm.assert_frame_equal(
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df,
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DataFrame({"index": ["1", "2"], "vals": [None, None]}).set_index("index"),
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)
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class TestDataFrameSelectReindex:
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# These are specific reindex-based tests; other indexing tests should go in
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# test_indexing
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def test_reindex_copies(self):
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# based on asv time_reindex_axis1
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N = 10
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df = DataFrame(np.random.randn(N * 10, N))
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cols = np.arange(N)
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np.random.shuffle(cols)
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result = df.reindex(columns=cols, copy=True)
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assert not np.shares_memory(result[0]._values, df[0]._values)
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# pass both columns and index
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result2 = df.reindex(columns=cols, index=df.index, copy=True)
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assert not np.shares_memory(result2[0]._values, df[0]._values)
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@td.skip_array_manager_not_yet_implemented
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def test_reindex_date_fill_value(self):
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# passing date to dt64 is deprecated
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arr = date_range("2016-01-01", periods=6).values.reshape(3, 2)
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df = DataFrame(arr, columns=["A", "B"], index=range(3))
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ts = df.iloc[0, 0]
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fv = ts.date()
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with tm.assert_produces_warning(FutureWarning):
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res = df.reindex(index=range(4), columns=["A", "B", "C"], fill_value=fv)
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expected = DataFrame(
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{"A": df["A"].tolist() + [ts], "B": df["B"].tolist() + [ts], "C": [ts] * 4}
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)
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tm.assert_frame_equal(res, expected)
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# only reindexing rows
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with tm.assert_produces_warning(FutureWarning):
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res = df.reindex(index=range(4), fill_value=fv)
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tm.assert_frame_equal(res, expected[["A", "B"]])
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# same with a datetime-castable str
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res = df.reindex(
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index=range(4), columns=["A", "B", "C"], fill_value="2016-01-01"
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)
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tm.assert_frame_equal(res, expected)
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def test_reindex_with_multi_index(self):
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# https://github.com/pandas-dev/pandas/issues/29896
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# tests for reindexing a multi-indexed DataFrame with a new MultiIndex
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#
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# confirms that we can reindex a multi-indexed DataFrame with a new
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# MultiIndex object correctly when using no filling, backfilling, and
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# padding
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#
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# The DataFrame, `df`, used in this test is:
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# c
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# a b
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# -1 0 A
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# 1 B
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# 2 C
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# 3 D
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# 4 E
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# 5 F
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# 6 G
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# 0 0 A
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# 1 B
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# 2 C
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# 3 D
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# 4 E
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# 5 F
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# 6 G
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# 1 0 A
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# 1 B
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# 2 C
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# 3 D
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# 4 E
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# 5 F
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# 6 G
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#
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# and the other MultiIndex, `new_multi_index`, is:
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# 0: 0 0.5
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# 1: 2.0
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# 2: 5.0
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# 3: 5.8
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df = DataFrame(
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{
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"a": [-1] * 7 + [0] * 7 + [1] * 7,
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"b": list(range(7)) * 3,
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"c": ["A", "B", "C", "D", "E", "F", "G"] * 3,
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}
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).set_index(["a", "b"])
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new_index = [0.5, 2.0, 5.0, 5.8]
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new_multi_index = MultiIndex.from_product([[0], new_index], names=["a", "b"])
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# reindexing w/o a `method` value
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reindexed = df.reindex(new_multi_index)
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expected = DataFrame(
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{"a": [0] * 4, "b": new_index, "c": [np.nan, "C", "F", np.nan]}
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).set_index(["a", "b"])
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tm.assert_frame_equal(expected, reindexed)
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# reindexing with backfilling
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expected = DataFrame(
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{"a": [0] * 4, "b": new_index, "c": ["B", "C", "F", "G"]}
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).set_index(["a", "b"])
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reindexed_with_backfilling = df.reindex(new_multi_index, method="bfill")
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tm.assert_frame_equal(expected, reindexed_with_backfilling)
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reindexed_with_backfilling = df.reindex(new_multi_index, method="backfill")
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tm.assert_frame_equal(expected, reindexed_with_backfilling)
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# reindexing with padding
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expected = DataFrame(
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{"a": [0] * 4, "b": new_index, "c": ["A", "C", "F", "F"]}
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).set_index(["a", "b"])
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reindexed_with_padding = df.reindex(new_multi_index, method="pad")
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tm.assert_frame_equal(expected, reindexed_with_padding)
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reindexed_with_padding = df.reindex(new_multi_index, method="ffill")
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tm.assert_frame_equal(expected, reindexed_with_padding)
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@pytest.mark.parametrize(
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"method,expected_values",
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[
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("nearest", [0, 1, 1, 2]),
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("pad", [np.nan, 0, 1, 1]),
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("backfill", [0, 1, 2, 2]),
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],
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)
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def test_reindex_methods(self, method, expected_values):
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df = DataFrame({"x": list(range(5))})
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target = np.array([-0.1, 0.9, 1.1, 1.5])
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expected = DataFrame({"x": expected_values}, index=target)
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actual = df.reindex(target, method=method)
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tm.assert_frame_equal(expected, actual)
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actual = df.reindex(target, method=method, tolerance=1)
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tm.assert_frame_equal(expected, actual)
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actual = df.reindex(target, method=method, tolerance=[1, 1, 1, 1])
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tm.assert_frame_equal(expected, actual)
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e2 = expected[::-1]
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actual = df.reindex(target[::-1], method=method)
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tm.assert_frame_equal(e2, actual)
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new_order = [3, 0, 2, 1]
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e2 = expected.iloc[new_order]
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actual = df.reindex(target[new_order], method=method)
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tm.assert_frame_equal(e2, actual)
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switched_method = (
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"pad" if method == "backfill" else "backfill" if method == "pad" else method
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)
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actual = df[::-1].reindex(target, method=switched_method)
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tm.assert_frame_equal(expected, actual)
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def test_reindex_methods_nearest_special(self):
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df = DataFrame({"x": list(range(5))})
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target = np.array([-0.1, 0.9, 1.1, 1.5])
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expected = DataFrame({"x": [0, 1, 1, np.nan]}, index=target)
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actual = df.reindex(target, method="nearest", tolerance=0.2)
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tm.assert_frame_equal(expected, actual)
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expected = DataFrame({"x": [0, np.nan, 1, np.nan]}, index=target)
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actual = df.reindex(target, method="nearest", tolerance=[0.5, 0.01, 0.4, 0.1])
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tm.assert_frame_equal(expected, actual)
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def test_reindex_nearest_tz(self, tz_aware_fixture):
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# GH26683
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tz = tz_aware_fixture
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idx = date_range("2019-01-01", periods=5, tz=tz)
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df = DataFrame({"x": list(range(5))}, index=idx)
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expected = df.head(3)
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actual = df.reindex(idx[:3], method="nearest")
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tm.assert_frame_equal(expected, actual)
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def test_reindex_nearest_tz_empty_frame(self):
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# https://github.com/pandas-dev/pandas/issues/31964
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dti = pd.DatetimeIndex(["2016-06-26 14:27:26+00:00"])
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df = DataFrame(index=pd.DatetimeIndex(["2016-07-04 14:00:59+00:00"]))
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expected = DataFrame(index=dti)
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result = df.reindex(dti, method="nearest")
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tm.assert_frame_equal(result, expected)
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def test_reindex_frame_add_nat(self):
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rng = date_range("1/1/2000 00:00:00", periods=10, freq="10s")
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df = DataFrame({"A": np.random.randn(len(rng)), "B": rng})
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result = df.reindex(range(15))
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assert np.issubdtype(result["B"].dtype, np.dtype("M8[ns]"))
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mask = com.isna(result)["B"]
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assert mask[-5:].all()
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assert not mask[:-5].any()
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@pytest.mark.parametrize(
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"method, exp_values",
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[("ffill", [0, 1, 2, 3]), ("bfill", [1.0, 2.0, 3.0, np.nan])],
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)
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def test_reindex_frame_tz_ffill_bfill(self, frame_or_series, method, exp_values):
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# GH#38566
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obj = frame_or_series(
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[0, 1, 2, 3],
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index=date_range("2020-01-01 00:00:00", periods=4, freq="H", tz="UTC"),
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)
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new_index = date_range("2020-01-01 00:01:00", periods=4, freq="H", tz="UTC")
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result = obj.reindex(new_index, method=method, tolerance=pd.Timedelta("1 hour"))
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expected = frame_or_series(exp_values, index=new_index)
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tm.assert_equal(result, expected)
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def test_reindex_limit(self):
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# GH 28631
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data = [["A", "A", "A"], ["B", "B", "B"], ["C", "C", "C"], ["D", "D", "D"]]
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exp_data = [
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["A", "A", "A"],
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["B", "B", "B"],
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["C", "C", "C"],
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["D", "D", "D"],
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["D", "D", "D"],
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[np.nan, np.nan, np.nan],
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]
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df = DataFrame(data)
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result = df.reindex([0, 1, 2, 3, 4, 5], method="ffill", limit=1)
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expected = DataFrame(exp_data)
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tm.assert_frame_equal(result, expected)
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@pytest.mark.parametrize(
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"idx, check_index_type",
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[
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[["C", "B", "A"], True],
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[["F", "C", "A", "D"], True],
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[["A"], True],
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[["A", "B", "C"], True],
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[["C", "A", "B"], True],
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[["C", "B"], True],
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[["C", "A"], True],
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[["A", "B"], True],
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[["B", "A", "C"], True],
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# reindex by these causes different MultiIndex levels
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[["D", "F"], False],
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[["A", "C", "B"], False],
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],
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)
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def test_reindex_level_verify_first_level(self, idx, check_index_type):
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df = DataFrame(
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{
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"jim": list("B" * 4 + "A" * 2 + "C" * 3),
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"joe": list("abcdeabcd")[::-1],
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"jolie": [10, 20, 30] * 3,
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"joline": np.random.randint(0, 1000, 9),
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}
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)
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icol = ["jim", "joe", "jolie"]
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def f(val):
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return np.nonzero((df["jim"] == val).to_numpy())[0]
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i = np.concatenate(list(map(f, idx)))
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left = df.set_index(icol).reindex(idx, level="jim")
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right = df.iloc[i].set_index(icol)
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tm.assert_frame_equal(left, right, check_index_type=check_index_type)
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@pytest.mark.parametrize(
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"idx",
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[
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("mid",),
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("mid", "btm"),
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("mid", "btm", "top"),
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("mid",),
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("mid", "top"),
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("mid", "top", "btm"),
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("btm",),
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("btm", "mid"),
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("btm", "mid", "top"),
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("btm",),
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("btm", "top"),
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("btm", "top", "mid"),
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("top",),
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("top", "mid"),
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("top", "mid", "btm"),
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("top",),
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("top", "btm"),
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("top", "btm", "mid"),
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],
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)
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def test_reindex_level_verify_first_level_repeats(self, idx):
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df = DataFrame(
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{
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"jim": ["mid"] * 5 + ["btm"] * 8 + ["top"] * 7,
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"joe": ["3rd"] * 2
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+ ["1st"] * 3
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+ ["2nd"] * 3
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+ ["1st"] * 2
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+ ["3rd"] * 3
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+ ["1st"] * 2
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+ ["3rd"] * 3
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+ ["2nd"] * 2,
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# this needs to be jointly unique with jim and joe or
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# reindexing will fail ~1.5% of the time, this works
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# out to needing unique groups of same size as joe
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"jolie": np.concatenate(
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[
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np.random.choice(1000, x, replace=False)
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for x in [2, 3, 3, 2, 3, 2, 3, 2]
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]
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),
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"joline": np.random.randn(20).round(3) * 10,
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}
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)
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icol = ["jim", "joe", "jolie"]
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def f(val):
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return np.nonzero((df["jim"] == val).to_numpy())[0]
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i = np.concatenate(list(map(f, idx)))
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left = df.set_index(icol).reindex(idx, level="jim")
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right = df.iloc[i].set_index(icol)
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tm.assert_frame_equal(left, right)
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|
|
@pytest.mark.parametrize(
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"idx, indexer",
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[
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[
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["1st", "2nd", "3rd"],
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[2, 3, 4, 0, 1, 8, 9, 5, 6, 7, 10, 11, 12, 13, 14, 18, 19, 15, 16, 17],
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],
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[
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["3rd", "2nd", "1st"],
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[0, 1, 2, 3, 4, 10, 11, 12, 5, 6, 7, 8, 9, 15, 16, 17, 18, 19, 13, 14],
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],
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[["2nd", "3rd"], [0, 1, 5, 6, 7, 10, 11, 12, 18, 19, 15, 16, 17]],
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[["3rd", "1st"], [0, 1, 2, 3, 4, 10, 11, 12, 8, 9, 15, 16, 17, 13, 14]],
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],
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)
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def test_reindex_level_verify_repeats(self, idx, indexer):
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df = DataFrame(
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{
|
|
"jim": ["mid"] * 5 + ["btm"] * 8 + ["top"] * 7,
|
|
"joe": ["3rd"] * 2
|
|
+ ["1st"] * 3
|
|
+ ["2nd"] * 3
|
|
+ ["1st"] * 2
|
|
+ ["3rd"] * 3
|
|
+ ["1st"] * 2
|
|
+ ["3rd"] * 3
|
|
+ ["2nd"] * 2,
|
|
# this needs to be jointly unique with jim and joe or
|
|
# reindexing will fail ~1.5% of the time, this works
|
|
# out to needing unique groups of same size as joe
|
|
"jolie": np.concatenate(
|
|
[
|
|
np.random.choice(1000, x, replace=False)
|
|
for x in [2, 3, 3, 2, 3, 2, 3, 2]
|
|
]
|
|
),
|
|
"joline": np.random.randn(20).round(3) * 10,
|
|
}
|
|
)
|
|
icol = ["jim", "joe", "jolie"]
|
|
left = df.set_index(icol).reindex(idx, level="joe")
|
|
right = df.iloc[indexer].set_index(icol)
|
|
tm.assert_frame_equal(left, right)
|
|
|
|
@pytest.mark.parametrize(
|
|
"idx, indexer, check_index_type",
|
|
[
|
|
[list("abcde"), [3, 2, 1, 0, 5, 4, 8, 7, 6], True],
|
|
[list("abcd"), [3, 2, 1, 0, 5, 8, 7, 6], True],
|
|
[list("abc"), [3, 2, 1, 8, 7, 6], True],
|
|
[list("eca"), [1, 3, 4, 6, 8], True],
|
|
[list("edc"), [0, 1, 4, 5, 6], True],
|
|
[list("eadbc"), [3, 0, 2, 1, 4, 5, 8, 7, 6], True],
|
|
[list("edwq"), [0, 4, 5], True],
|
|
[list("wq"), [], False],
|
|
],
|
|
)
|
|
def test_reindex_level_verify(self, idx, indexer, check_index_type):
|
|
df = DataFrame(
|
|
{
|
|
"jim": list("B" * 4 + "A" * 2 + "C" * 3),
|
|
"joe": list("abcdeabcd")[::-1],
|
|
"jolie": [10, 20, 30] * 3,
|
|
"joline": np.random.randint(0, 1000, 9),
|
|
}
|
|
)
|
|
icol = ["jim", "joe", "jolie"]
|
|
left = df.set_index(icol).reindex(idx, level="joe")
|
|
right = df.iloc[indexer].set_index(icol)
|
|
tm.assert_frame_equal(left, right, check_index_type=check_index_type)
|
|
|
|
def test_non_monotonic_reindex_methods(self):
|
|
dr = date_range("2013-08-01", periods=6, freq="B")
|
|
data = np.random.randn(6, 1)
|
|
df = DataFrame(data, index=dr, columns=list("A"))
|
|
df_rev = DataFrame(data, index=dr[[3, 4, 5] + [0, 1, 2]], columns=list("A"))
|
|
# index is not monotonic increasing or decreasing
|
|
msg = "index must be monotonic increasing or decreasing"
|
|
with pytest.raises(ValueError, match=msg):
|
|
df_rev.reindex(df.index, method="pad")
|
|
with pytest.raises(ValueError, match=msg):
|
|
df_rev.reindex(df.index, method="ffill")
|
|
with pytest.raises(ValueError, match=msg):
|
|
df_rev.reindex(df.index, method="bfill")
|
|
with pytest.raises(ValueError, match=msg):
|
|
df_rev.reindex(df.index, method="nearest")
|
|
|
|
def test_reindex_sparse(self):
|
|
# https://github.com/pandas-dev/pandas/issues/35286
|
|
df = DataFrame(
|
|
{"A": [0, 1], "B": pd.array([0, 1], dtype=pd.SparseDtype("int64", 0))}
|
|
)
|
|
result = df.reindex([0, 2])
|
|
expected = DataFrame(
|
|
{
|
|
"A": [0.0, np.nan],
|
|
"B": pd.array([0.0, np.nan], dtype=pd.SparseDtype("float64", 0.0)),
|
|
},
|
|
index=[0, 2],
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex(self, float_frame):
|
|
datetime_series = tm.makeTimeSeries(nper=30)
|
|
|
|
newFrame = float_frame.reindex(datetime_series.index)
|
|
|
|
for col in newFrame.columns:
|
|
for idx, val in newFrame[col].items():
|
|
if idx in float_frame.index:
|
|
if np.isnan(val):
|
|
assert np.isnan(float_frame[col][idx])
|
|
else:
|
|
assert val == float_frame[col][idx]
|
|
else:
|
|
assert np.isnan(val)
|
|
|
|
for col, series in newFrame.items():
|
|
assert tm.equalContents(series.index, newFrame.index)
|
|
emptyFrame = float_frame.reindex(Index([]))
|
|
assert len(emptyFrame.index) == 0
|
|
|
|
# Cython code should be unit-tested directly
|
|
nonContigFrame = float_frame.reindex(datetime_series.index[::2])
|
|
|
|
for col in nonContigFrame.columns:
|
|
for idx, val in nonContigFrame[col].items():
|
|
if idx in float_frame.index:
|
|
if np.isnan(val):
|
|
assert np.isnan(float_frame[col][idx])
|
|
else:
|
|
assert val == float_frame[col][idx]
|
|
else:
|
|
assert np.isnan(val)
|
|
|
|
for col, series in nonContigFrame.items():
|
|
assert tm.equalContents(series.index, nonContigFrame.index)
|
|
|
|
# corner cases
|
|
|
|
# Same index, copies values but not index if copy=False
|
|
newFrame = float_frame.reindex(float_frame.index, copy=False)
|
|
assert newFrame.index is float_frame.index
|
|
|
|
# length zero
|
|
newFrame = float_frame.reindex([])
|
|
assert newFrame.empty
|
|
assert len(newFrame.columns) == len(float_frame.columns)
|
|
|
|
# length zero with columns reindexed with non-empty index
|
|
newFrame = float_frame.reindex([])
|
|
newFrame = newFrame.reindex(float_frame.index)
|
|
assert len(newFrame.index) == len(float_frame.index)
|
|
assert len(newFrame.columns) == len(float_frame.columns)
|
|
|
|
# pass non-Index
|
|
newFrame = float_frame.reindex(list(datetime_series.index))
|
|
expected = datetime_series.index._with_freq(None)
|
|
tm.assert_index_equal(newFrame.index, expected)
|
|
|
|
# copy with no axes
|
|
result = float_frame.reindex()
|
|
tm.assert_frame_equal(result, float_frame)
|
|
assert result is not float_frame
|
|
|
|
def test_reindex_nan(self):
|
|
df = DataFrame(
|
|
[[1, 2], [3, 5], [7, 11], [9, 23]],
|
|
index=[2, np.nan, 1, 5],
|
|
columns=["joe", "jim"],
|
|
)
|
|
|
|
i, j = [np.nan, 5, 5, np.nan, 1, 2, np.nan], [1, 3, 3, 1, 2, 0, 1]
|
|
tm.assert_frame_equal(df.reindex(i), df.iloc[j])
|
|
|
|
df.index = df.index.astype("object")
|
|
tm.assert_frame_equal(df.reindex(i), df.iloc[j], check_index_type=False)
|
|
|
|
# GH10388
|
|
df = DataFrame(
|
|
{
|
|
"other": ["a", "b", np.nan, "c"],
|
|
"date": ["2015-03-22", np.nan, "2012-01-08", np.nan],
|
|
"amount": [2, 3, 4, 5],
|
|
}
|
|
)
|
|
|
|
df["date"] = pd.to_datetime(df.date)
|
|
df["delta"] = (pd.to_datetime("2015-06-18") - df["date"]).shift(1)
|
|
|
|
left = df.set_index(["delta", "other", "date"]).reset_index()
|
|
right = df.reindex(columns=["delta", "other", "date", "amount"])
|
|
tm.assert_frame_equal(left, right)
|
|
|
|
def test_reindex_name_remains(self):
|
|
s = Series(np.random.rand(10))
|
|
df = DataFrame(s, index=np.arange(len(s)))
|
|
i = Series(np.arange(10), name="iname")
|
|
|
|
df = df.reindex(i)
|
|
assert df.index.name == "iname"
|
|
|
|
df = df.reindex(Index(np.arange(10), name="tmpname"))
|
|
assert df.index.name == "tmpname"
|
|
|
|
s = Series(np.random.rand(10))
|
|
df = DataFrame(s.T, index=np.arange(len(s)))
|
|
i = Series(np.arange(10), name="iname")
|
|
df = df.reindex(columns=i)
|
|
assert df.columns.name == "iname"
|
|
|
|
def test_reindex_int(self, int_frame):
|
|
smaller = int_frame.reindex(int_frame.index[::2])
|
|
|
|
assert smaller["A"].dtype == np.int64
|
|
|
|
bigger = smaller.reindex(int_frame.index)
|
|
assert bigger["A"].dtype == np.float64
|
|
|
|
smaller = int_frame.reindex(columns=["A", "B"])
|
|
assert smaller["A"].dtype == np.int64
|
|
|
|
def test_reindex_columns(self, float_frame):
|
|
new_frame = float_frame.reindex(columns=["A", "B", "E"])
|
|
|
|
tm.assert_series_equal(new_frame["B"], float_frame["B"])
|
|
assert np.isnan(new_frame["E"]).all()
|
|
assert "C" not in new_frame
|
|
|
|
# Length zero
|
|
new_frame = float_frame.reindex(columns=[])
|
|
assert new_frame.empty
|
|
|
|
def test_reindex_columns_method(self):
|
|
|
|
# GH 14992, reindexing over columns ignored method
|
|
df = DataFrame(
|
|
data=[[11, 12, 13], [21, 22, 23], [31, 32, 33]],
|
|
index=[1, 2, 4],
|
|
columns=[1, 2, 4],
|
|
dtype=float,
|
|
)
|
|
|
|
# default method
|
|
result = df.reindex(columns=range(6))
|
|
expected = DataFrame(
|
|
data=[
|
|
[np.nan, 11, 12, np.nan, 13, np.nan],
|
|
[np.nan, 21, 22, np.nan, 23, np.nan],
|
|
[np.nan, 31, 32, np.nan, 33, np.nan],
|
|
],
|
|
index=[1, 2, 4],
|
|
columns=range(6),
|
|
dtype=float,
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# method='ffill'
|
|
result = df.reindex(columns=range(6), method="ffill")
|
|
expected = DataFrame(
|
|
data=[
|
|
[np.nan, 11, 12, 12, 13, 13],
|
|
[np.nan, 21, 22, 22, 23, 23],
|
|
[np.nan, 31, 32, 32, 33, 33],
|
|
],
|
|
index=[1, 2, 4],
|
|
columns=range(6),
|
|
dtype=float,
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# method='bfill'
|
|
result = df.reindex(columns=range(6), method="bfill")
|
|
expected = DataFrame(
|
|
data=[
|
|
[11, 11, 12, 13, 13, np.nan],
|
|
[21, 21, 22, 23, 23, np.nan],
|
|
[31, 31, 32, 33, 33, np.nan],
|
|
],
|
|
index=[1, 2, 4],
|
|
columns=range(6),
|
|
dtype=float,
|
|
)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_axes(self):
|
|
# GH 3317, reindexing by both axes loses freq of the index
|
|
df = DataFrame(
|
|
np.ones((3, 3)),
|
|
index=[datetime(2012, 1, 1), datetime(2012, 1, 2), datetime(2012, 1, 3)],
|
|
columns=["a", "b", "c"],
|
|
)
|
|
time_freq = date_range("2012-01-01", "2012-01-03", freq="d")
|
|
some_cols = ["a", "b"]
|
|
|
|
index_freq = df.reindex(index=time_freq).index.freq
|
|
both_freq = df.reindex(index=time_freq, columns=some_cols).index.freq
|
|
seq_freq = df.reindex(index=time_freq).reindex(columns=some_cols).index.freq
|
|
assert index_freq == both_freq
|
|
assert index_freq == seq_freq
|
|
|
|
def test_reindex_fill_value(self):
|
|
df = DataFrame(np.random.randn(10, 4))
|
|
|
|
# axis=0
|
|
result = df.reindex(list(range(15)))
|
|
assert np.isnan(result.values[-5:]).all()
|
|
|
|
result = df.reindex(range(15), fill_value=0)
|
|
expected = df.reindex(range(15)).fillna(0)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# axis=1
|
|
result = df.reindex(columns=range(5), fill_value=0.0)
|
|
expected = df.copy()
|
|
expected[4] = 0.0
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.reindex(columns=range(5), fill_value=0)
|
|
expected = df.copy()
|
|
expected[4] = 0
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.reindex(columns=range(5), fill_value="foo")
|
|
expected = df.copy()
|
|
expected[4] = "foo"
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# other dtypes
|
|
df["foo"] = "foo"
|
|
result = df.reindex(range(15), fill_value=0)
|
|
expected = df.reindex(range(15)).fillna(0)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_dups(self):
|
|
|
|
# GH4746, reindex on duplicate index error messages
|
|
arr = np.random.randn(10)
|
|
df = DataFrame(arr, index=[1, 2, 3, 4, 5, 1, 2, 3, 4, 5])
|
|
|
|
# set index is ok
|
|
result = df.copy()
|
|
result.index = list(range(len(df)))
|
|
expected = DataFrame(arr, index=list(range(len(df))))
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
# reindex fails
|
|
msg = "cannot reindex on an axis with duplicate labels"
|
|
with pytest.raises(ValueError, match=msg):
|
|
with tm.assert_produces_warning(FutureWarning, match="non-unique"):
|
|
df.reindex(index=list(range(len(df))))
|
|
|
|
def test_reindex_with_duplicate_columns(self):
|
|
|
|
# reindex is invalid!
|
|
df = DataFrame(
|
|
[[1, 5, 7.0], [1, 5, 7.0], [1, 5, 7.0]], columns=["bar", "a", "a"]
|
|
)
|
|
msg = "cannot reindex on an axis with duplicate labels"
|
|
with pytest.raises(ValueError, match=msg):
|
|
with tm.assert_produces_warning(FutureWarning, match="non-unique"):
|
|
df.reindex(columns=["bar"])
|
|
with pytest.raises(ValueError, match=msg):
|
|
with tm.assert_produces_warning(FutureWarning, match="non-unique"):
|
|
df.reindex(columns=["bar", "foo"])
|
|
|
|
def test_reindex_axis_style(self):
|
|
# https://github.com/pandas-dev/pandas/issues/12392
|
|
df = DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
|
|
expected = DataFrame(
|
|
{"A": [1, 2, np.nan], "B": [4, 5, np.nan]}, index=[0, 1, 3]
|
|
)
|
|
result = df.reindex([0, 1, 3])
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.reindex([0, 1, 3], axis=0)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.reindex([0, 1, 3], axis="index")
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_positional_warns(self):
|
|
# https://github.com/pandas-dev/pandas/issues/12392
|
|
df = DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
|
|
expected = DataFrame({"A": [1.0, 2], "B": [4.0, 5], "C": [np.nan, np.nan]})
|
|
with tm.assert_produces_warning(FutureWarning):
|
|
result = df.reindex([0, 1], ["A", "B", "C"])
|
|
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_axis_style_raises(self):
|
|
# https://github.com/pandas-dev/pandas/issues/12392
|
|
df = DataFrame({"A": [1, 2, 3], "B": [4, 5, 6]})
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex([0, 1], ["A"], axis=1)
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex([0, 1], ["A"], axis="index")
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex(index=[0, 1], axis="index")
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex(index=[0, 1], axis="columns")
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex(columns=[0, 1], axis="columns")
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex(index=[0, 1], columns=[0, 1], axis="columns")
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify all"):
|
|
df.reindex([0, 1], [0], ["A"])
|
|
|
|
# Mixing styles
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex(index=[0, 1], axis="index")
|
|
|
|
with pytest.raises(TypeError, match="Cannot specify both 'axis'"):
|
|
df.reindex(index=[0, 1], axis="columns")
|
|
|
|
# Duplicates
|
|
with pytest.raises(TypeError, match="multiple values"):
|
|
df.reindex([0, 1], labels=[0, 1])
|
|
|
|
def test_reindex_single_named_indexer(self):
|
|
# https://github.com/pandas-dev/pandas/issues/12392
|
|
df = DataFrame({"A": [1, 2, 3], "B": [1, 2, 3]})
|
|
result = df.reindex([0, 1], columns=["A"])
|
|
expected = DataFrame({"A": [1, 2]})
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_api_equivalence(self):
|
|
# https://github.com/pandas-dev/pandas/issues/12392
|
|
# equivalence of the labels/axis and index/columns API's
|
|
df = DataFrame(
|
|
[[1, 2, 3], [3, 4, 5], [5, 6, 7]],
|
|
index=["a", "b", "c"],
|
|
columns=["d", "e", "f"],
|
|
)
|
|
|
|
res1 = df.reindex(["b", "a"])
|
|
res2 = df.reindex(index=["b", "a"])
|
|
res3 = df.reindex(labels=["b", "a"])
|
|
res4 = df.reindex(labels=["b", "a"], axis=0)
|
|
res5 = df.reindex(["b", "a"], axis=0)
|
|
for res in [res2, res3, res4, res5]:
|
|
tm.assert_frame_equal(res1, res)
|
|
|
|
res1 = df.reindex(columns=["e", "d"])
|
|
res2 = df.reindex(["e", "d"], axis=1)
|
|
res3 = df.reindex(labels=["e", "d"], axis=1)
|
|
for res in [res2, res3]:
|
|
tm.assert_frame_equal(res1, res)
|
|
|
|
with tm.assert_produces_warning(FutureWarning) as m:
|
|
res1 = df.reindex(["b", "a"], ["e", "d"])
|
|
assert "reindex" in str(m[0].message)
|
|
res2 = df.reindex(columns=["e", "d"], index=["b", "a"])
|
|
res3 = df.reindex(labels=["b", "a"], axis=0).reindex(labels=["e", "d"], axis=1)
|
|
for res in [res2, res3]:
|
|
tm.assert_frame_equal(res1, res)
|
|
|
|
def test_reindex_boolean(self):
|
|
frame = DataFrame(
|
|
np.ones((10, 2), dtype=bool), index=np.arange(0, 20, 2), columns=[0, 2]
|
|
)
|
|
|
|
reindexed = frame.reindex(np.arange(10))
|
|
assert reindexed.values.dtype == np.object_
|
|
assert isna(reindexed[0][1])
|
|
|
|
reindexed = frame.reindex(columns=range(3))
|
|
assert reindexed.values.dtype == np.object_
|
|
assert isna(reindexed[1]).all()
|
|
|
|
def test_reindex_objects(self, float_string_frame):
|
|
reindexed = float_string_frame.reindex(columns=["foo", "A", "B"])
|
|
assert "foo" in reindexed
|
|
|
|
reindexed = float_string_frame.reindex(columns=["A", "B"])
|
|
assert "foo" not in reindexed
|
|
|
|
def test_reindex_corner(self, int_frame):
|
|
index = Index(["a", "b", "c"])
|
|
dm = DataFrame({}).reindex(index=[1, 2, 3])
|
|
reindexed = dm.reindex(columns=index)
|
|
tm.assert_index_equal(reindexed.columns, index)
|
|
|
|
# ints are weird
|
|
smaller = int_frame.reindex(columns=["A", "B", "E"])
|
|
assert smaller["E"].dtype == np.float64
|
|
|
|
def test_reindex_with_nans(self):
|
|
df = DataFrame(
|
|
[[1, 2], [3, 4], [np.nan, np.nan], [7, 8], [9, 10]],
|
|
columns=["a", "b"],
|
|
index=[100.0, 101.0, np.nan, 102.0, 103.0],
|
|
)
|
|
|
|
result = df.reindex(index=[101.0, 102.0, 103.0])
|
|
expected = df.iloc[[1, 3, 4]]
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.reindex(index=[103.0])
|
|
expected = df.iloc[[4]]
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
result = df.reindex(index=[101.0])
|
|
expected = df.iloc[[1]]
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_multi(self):
|
|
df = DataFrame(np.random.randn(3, 3))
|
|
|
|
result = df.reindex(index=range(4), columns=range(4))
|
|
expected = df.reindex(list(range(4))).reindex(columns=range(4))
|
|
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
df = DataFrame(np.random.randint(0, 10, (3, 3)))
|
|
|
|
result = df.reindex(index=range(4), columns=range(4))
|
|
expected = df.reindex(list(range(4))).reindex(columns=range(4))
|
|
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
df = DataFrame(np.random.randint(0, 10, (3, 3)))
|
|
|
|
result = df.reindex(index=range(2), columns=range(2))
|
|
expected = df.reindex(range(2)).reindex(columns=range(2))
|
|
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
df = DataFrame(np.random.randn(5, 3) + 1j, columns=["a", "b", "c"])
|
|
|
|
result = df.reindex(index=[0, 1], columns=["a", "b"])
|
|
expected = df.reindex([0, 1]).reindex(columns=["a", "b"])
|
|
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_multi_categorical_time(self):
|
|
# https://github.com/pandas-dev/pandas/issues/21390
|
|
midx = MultiIndex.from_product(
|
|
[
|
|
Categorical(["a", "b", "c"]),
|
|
Categorical(date_range("2012-01-01", periods=3, freq="H")),
|
|
]
|
|
)
|
|
df = DataFrame({"a": range(len(midx))}, index=midx)
|
|
df2 = df.iloc[[0, 1, 2, 3, 4, 5, 6, 8]]
|
|
|
|
result = df2.reindex(midx)
|
|
expected = DataFrame({"a": [0, 1, 2, 3, 4, 5, 6, np.nan, 8]}, index=midx)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
def test_reindex_with_categoricalindex(self):
|
|
df = DataFrame(
|
|
{
|
|
"A": np.arange(3, dtype="int64"),
|
|
},
|
|
index=CategoricalIndex(list("abc"), dtype=CDT(list("cabe")), name="B"),
|
|
)
|
|
|
|
# reindexing
|
|
# convert to a regular index
|
|
result = df.reindex(["a", "b", "e"])
|
|
expected = DataFrame({"A": [0, 1, np.nan], "B": Series(list("abe"))}).set_index(
|
|
"B"
|
|
)
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(["a", "b"])
|
|
expected = DataFrame({"A": [0, 1], "B": Series(list("ab"))}).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(["e"])
|
|
expected = DataFrame({"A": [np.nan], "B": Series(["e"])}).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(["d"])
|
|
expected = DataFrame({"A": [np.nan], "B": Series(["d"])}).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
# since we are actually reindexing with a Categorical
|
|
# then return a Categorical
|
|
cats = list("cabe")
|
|
|
|
result = df.reindex(Categorical(["a", "e"], categories=cats))
|
|
expected = DataFrame(
|
|
{"A": [0, np.nan], "B": Series(list("ae")).astype(CDT(cats))}
|
|
).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(Categorical(["a"], categories=cats))
|
|
expected = DataFrame(
|
|
{"A": [0], "B": Series(list("a")).astype(CDT(cats))}
|
|
).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(["a", "b", "e"])
|
|
expected = DataFrame({"A": [0, 1, np.nan], "B": Series(list("abe"))}).set_index(
|
|
"B"
|
|
)
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(["a", "b"])
|
|
expected = DataFrame({"A": [0, 1], "B": Series(list("ab"))}).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(["e"])
|
|
expected = DataFrame({"A": [np.nan], "B": Series(["e"])}).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
# give back the type of categorical that we received
|
|
result = df.reindex(Categorical(["a", "e"], categories=cats, ordered=True))
|
|
expected = DataFrame(
|
|
{"A": [0, np.nan], "B": Series(list("ae")).astype(CDT(cats, ordered=True))}
|
|
).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
result = df.reindex(Categorical(["a", "d"], categories=["a", "d"]))
|
|
expected = DataFrame(
|
|
{"A": [0, np.nan], "B": Series(list("ad")).astype(CDT(["a", "d"]))}
|
|
).set_index("B")
|
|
tm.assert_frame_equal(result, expected, check_index_type=True)
|
|
|
|
df2 = DataFrame(
|
|
{
|
|
"A": np.arange(6, dtype="int64"),
|
|
},
|
|
index=CategoricalIndex(list("aabbca"), dtype=CDT(list("cabe")), name="B"),
|
|
)
|
|
# passed duplicate indexers are not allowed
|
|
msg = "cannot reindex on an axis with duplicate labels"
|
|
with pytest.raises(ValueError, match=msg):
|
|
with tm.assert_produces_warning(FutureWarning, match="non-unique"):
|
|
df2.reindex(["a", "b"])
|
|
|
|
# args NotImplemented ATM
|
|
msg = r"argument {} is not implemented for CategoricalIndex\.reindex"
|
|
with pytest.raises(NotImplementedError, match=msg.format("method")):
|
|
df.reindex(["a"], method="ffill")
|
|
with pytest.raises(NotImplementedError, match=msg.format("level")):
|
|
df.reindex(["a"], level=1)
|
|
with pytest.raises(NotImplementedError, match=msg.format("limit")):
|
|
df.reindex(["a"], limit=2)
|
|
|
|
def test_reindex_signature(self):
|
|
sig = inspect.signature(DataFrame.reindex)
|
|
parameters = set(sig.parameters)
|
|
assert parameters == {
|
|
"self",
|
|
"labels",
|
|
"index",
|
|
"columns",
|
|
"axis",
|
|
"limit",
|
|
"copy",
|
|
"level",
|
|
"method",
|
|
"fill_value",
|
|
"tolerance",
|
|
}
|
|
|
|
def test_reindex_multiindex_ffill_added_rows(self):
|
|
# GH#23693
|
|
# reindex added rows with nan values even when fill method was specified
|
|
mi = MultiIndex.from_tuples([("a", "b"), ("d", "e")])
|
|
df = DataFrame([[0, 7], [3, 4]], index=mi, columns=["x", "y"])
|
|
mi2 = MultiIndex.from_tuples([("a", "b"), ("d", "e"), ("h", "i")])
|
|
result = df.reindex(mi2, axis=0, method="ffill")
|
|
expected = DataFrame([[0, 7], [3, 4], [3, 4]], index=mi2, columns=["x", "y"])
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
@pytest.mark.parametrize(
|
|
"kwargs",
|
|
[
|
|
{"method": "pad", "tolerance": timedelta(seconds=9)},
|
|
{"method": "backfill", "tolerance": timedelta(seconds=9)},
|
|
{"method": "nearest"},
|
|
{"method": None},
|
|
],
|
|
)
|
|
def test_reindex_empty_frame(self, kwargs):
|
|
# GH#27315
|
|
idx = date_range(start="2020", freq="30s", periods=3)
|
|
df = DataFrame([], index=Index([], name="time"), columns=["a"])
|
|
result = df.reindex(idx, **kwargs)
|
|
expected = DataFrame({"a": [pd.NA] * 3}, index=idx)
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
@pytest.mark.parametrize(
|
|
"src_idx",
|
|
[
|
|
Index([]),
|
|
CategoricalIndex([]),
|
|
],
|
|
)
|
|
@pytest.mark.parametrize(
|
|
"cat_idx",
|
|
[
|
|
# No duplicates
|
|
Index([]),
|
|
CategoricalIndex([]),
|
|
Index(["A", "B"]),
|
|
CategoricalIndex(["A", "B"]),
|
|
# Duplicates: GH#38906
|
|
Index(["A", "A"]),
|
|
CategoricalIndex(["A", "A"]),
|
|
],
|
|
)
|
|
def test_reindex_empty(self, src_idx, cat_idx):
|
|
df = DataFrame(columns=src_idx, index=["K"], dtype="f8")
|
|
|
|
result = df.reindex(columns=cat_idx)
|
|
expected = DataFrame(index=["K"], columns=cat_idx, dtype="f8")
|
|
tm.assert_frame_equal(result, expected)
|
|
|
|
@pytest.mark.parametrize("dtype", ["m8[ns]", "M8[ns]"])
|
|
def test_reindex_datetimelike_to_object(self, dtype):
|
|
# GH#39755 dont cast dt64/td64 to ints
|
|
mi = MultiIndex.from_product([list("ABCDE"), range(2)])
|
|
|
|
dti = date_range("2016-01-01", periods=10)
|
|
fv = np.timedelta64("NaT", "ns")
|
|
if dtype == "m8[ns]":
|
|
dti = dti - dti[0]
|
|
fv = np.datetime64("NaT", "ns")
|
|
|
|
ser = Series(dti, index=mi)
|
|
ser[::3] = pd.NaT
|
|
|
|
df = ser.unstack()
|
|
|
|
index = df.index.append(Index([1]))
|
|
columns = df.columns.append(Index(["foo"]))
|
|
|
|
res = df.reindex(index=index, columns=columns, fill_value=fv)
|
|
|
|
expected = DataFrame(
|
|
{
|
|
0: df[0].tolist() + [fv],
|
|
1: df[1].tolist() + [fv],
|
|
"foo": np.array(["NaT"] * 6, dtype=fv.dtype),
|
|
},
|
|
index=index,
|
|
)
|
|
assert (res.dtypes[[0, 1]] == object).all()
|
|
assert res.iloc[0, 0] is pd.NaT
|
|
assert res.iloc[-1, 0] is fv
|
|
assert res.iloc[-1, 1] is fv
|
|
tm.assert_frame_equal(res, expected)
|
|
|
|
@pytest.mark.parametrize(
|
|
"index_df,index_res,index_exp",
|
|
[
|
|
(
|
|
CategoricalIndex([], categories=["A"]),
|
|
Index(["A"]),
|
|
Index(["A"]),
|
|
),
|
|
(
|
|
CategoricalIndex([], categories=["A"]),
|
|
Index(["B"]),
|
|
Index(["B"]),
|
|
),
|
|
(
|
|
CategoricalIndex([], categories=["A"]),
|
|
CategoricalIndex(["A"]),
|
|
CategoricalIndex(["A"]),
|
|
),
|
|
(
|
|
CategoricalIndex([], categories=["A"]),
|
|
CategoricalIndex(["B"]),
|
|
CategoricalIndex(["B"]),
|
|
),
|
|
],
|
|
)
|
|
def test_reindex_not_category(self, index_df, index_res, index_exp):
|
|
# GH#28690
|
|
df = DataFrame(index=index_df)
|
|
result = df.reindex(index=index_res)
|
|
expected = DataFrame(index=index_exp)
|
|
tm.assert_frame_equal(result, expected)
|
|
|